986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post

RandallNeighbour · 04-24-2008, 01:56 PM

I replaced my original rotors last month with Zimmermann cross-drilled rotors.

My braking was fine until a couple of weeks ago. Now, when I am forced to do hard braking at freeway speeds, the steering wheel shakes like nobody's business all the way down to about 20 miles per hour.

I am also noticing a new vibration in the wheel and body of the car at freeway speeds I didn't have before. I thought this was a wheel out of balance, but now I'm wondering if I have a warped rotor.

1. How can I check to see which rotor may be warped? A visual inspection (wheel on the car still) yielded nothing out of the ordinary...

2. Are there any other sources for this problem, such as ABS sensors?

04-24-2008, 01:56 PM	#1
RandallNeighbour Registered User Join Date: Jul 2004 Location: Houston, Texas Posts: 7,243	warped rotor? I replaced my original rotors last month with Zimmermann cross-drilled rotors. My braking was fine until a couple of weeks ago. Now, when I am forced to do hard braking at freeway speeds, the steering wheel shakes like nobody's business all the way down to about 20 miles per hour. I am also noticing a new vibration in the wheel and body of the car at freeway speeds I didn't have before. I thought this was a wheel out of balance, but now I'm wondering if I have a warped rotor. 1. How can I check to see which rotor may be warped? A visual inspection (wheel on the car still) yielded nothing out of the ordinary... 2. Are there any other sources for this problem, such as ABS sensors?